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Lighting unit e.g. front light, controlling method for vehicle, involves calculating turn-on and turn-off time points of LED light sources of chain during modulation period, so that number of sources turned on during period is minimized
Lighting unit e.g. front light, controlling method for vehicle, involves calculating turn-on and turn-off time points of LED light sources of chain during modulation period, so that number of sources turned on during period is minimized
The method involves operating a set of LED light sources (32.1, 42.1) with a predetermined brightness value to adjust desired light distribution of a light source matrix emitting light. A chain with a predetermined number of individual LED light sources is formed, where the individual LED light sources are supplied with energy from transformer units (33, 43). Turn-on time points and turn-off time points of the LED light sources of the chain are calculated during a pulse width modulation period, so that the number of the LED light sources turned on during the modulation period is minimized. Independent claims are also included for the following: (1) a lighting device comprising a lighting unit (2) a computer program with a program code unit for executing a method for controlling a lighting unit of a lighting device for a vehicle (3) a computer program product with a program code unit for executing a method for controlling a lighting unit of a lighting device for a vehicle.
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